Muffling device.



W. L. vTOBEY.

, I MUPFLING DEVICE. APPLIUATION IILED'AUG. 15, 1912. I

4 111 I Patented De0.24, 1912.

wilt/1255765:

WILLIAM L. TOBEY, F -ii/IIT'LIIEOI, MASSACHUSETTS.

' KUFFLING DEVICE.

- f 1,048.111. it

Specification of Letters Patent.

Application filed August 15, 1912. Serial No. 715,225.

To all whom it may concern:

Be it known. that I, WILLIAM L. Toner,

a citizen of the United States, residing-in Winthrop, county of Sufi'olk, and State of Massachusetts, have invented an Improvement in Muliiin'g Devices, of which the following description, in connection withthe accompanying drawings, is ,a specification,

like letters on the drawings representing LO) like parts.

This invention relates to a device for mufliing the exhaust of internal combustion engines or motors; and more particularly those used in motor boats. I

The invention has for its object to pro'vid a simple, efficient and inexpensive device for. the purpose specified.

To this end, the muffler consists of a casing or shell which is preferably spherical in .0 form and is provided with a gas inlet and a gas outlet, preferably located substantially at right angles to each other, with the gas inlet located near the circumference of the casing and substantially at a tangent thereto and With the'gasoutlet located at or near the center-of the casing, whereby the gases Which enter the casing may be given a rotary motion which is substantially re duced at the center of the casing, so that the gases may issue from the casing" with substantially little noise.

Provision is made for regulating or ad justingthe passage of the gases out of the casing Will be described and also for reducing the temperature of the gases.

' These and other features of this invention will be pointed out inthe claims at the end of "this specification.

Figure liis an elevation of a device end- 40 bodying' this invention. Fig". 2, a section on the line 2 2, Fig. 1, and Fig. 3', a. section on the line 3-3, Fig. 2. A

Referring' to the drawings, (t represents a hollow casino, or shell, which. is preferably v spherical in form see i provided near its circumference with a s, 'nlet Z),."w'lnch extended from the sphcricalcasing subst tially at a tangent thereto, so that the can...

discharged into the casing from the motor.

at {not shown) nayhave imparted, to c rstary motion within the cas ng, they pass n a substantia ly through an outlet located near the center of the casing substantially at right angles to the inlet 6. In the present instance, the gas outlet for the casing a is formed by pipe 0,

which engages a threaded opening in a boss d on the said casing, and is adjustably extended into the latter to"near its center as represented in Fig. 2," said pipe being open at its inner end for the passage of the gases into the same from the casing. By refer- Patented Dec. 2%, 1912 ence to Figs. 1 and 3, it will be seen that the gases pass out or" the casinn at the point within the latter, where the velocity of the gases is materially reduced and also pass out from the casings,- in a direction substantially at right angles to the path of rotation of the gases Within the casing, and as a result, the gases are muifled down so that they may be discharged from the outlet pipe 0 into the air without objectionable noise.

Provision is made for insuring a continuous flow ,of the gases out of the casing a, and indie present instance this result is obtained by a threaded pipe 10, which is ex tended into the casing'throu h a threaded opening in a boss. 12 located su stuntially diametrically opposite to the threaded boss 62.

The pipe 10 is capable of being; adjusted toward or from the open inlet eiid of the outlet pipe 0 and practically forms a valve for regulating the passage of the gases from the casing into the outlet pipe 0. The pipe 10 is closed at its outer end by a cap 13 and. may be secured in its adjusted position by the nut 14. coiiperating with the boss 12.

By reference to Fig. 2, it will be seen that the endsof the pipes 0, 10, are separated by a-space 15, through which the gases pass from the casing a into the outlet pipe 0, and that the quantity or volume of the ra see which passes to the outlet pipe may be varied by adjusting the pipe 10 so as to increase or decrease the width of the space 15. The threaded openings in the bosses d, 12, are preferably of the diameter or sizo', so that the position of the pipes o 10, may be reversed from that shown in Fig. 2, to enable the outlet pipe.

gmyin 8 open at its i f1fl(3l(2l'l(l mm (amended through In testimony whereof, I have signed my mud exhmzgt outlet opremng min Hill cnmng, 112mm to Hm; .Hjfli lfi fililflll m the n'uwemac of '10 and a deviceaurrzmi by mid mung and QXA iu'u slllrrtliblflg wnnesses.

fended therein and zuljustnhhe [mun-r! and u I i from said mullet, pipe and nui'lpl'nning with"; v WILLIAM the opning Umrcin in l'vgfliule Hm mil-511,2 3 \"'il1) =sms1 of the gum; from Um waxing inio Um (exhaust J H. (huzucumn,

pipe, for the purpose specified. i J. MURPHY. 

